Question about 1999 Chevrolet Suburban

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Why are there two batteries in my 1999 chevy suburban. There is space for an extra battery so I bought two new identical batteries when I bought it. Should I put a switch in it, like a boat, hook them both to the alternator? In series, in parallel? I'm a little confused

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TWO BATTERIES GIVE YOU MORE CRANKING AMPS.SINCE YOU HAVE BIGGER ENGINE.BATTERIES WOULD BE PARALLEL FOR 12 VOLT SYSTEM. THE SERIES HOOK UP WILL GIVE YOU 24 VOLTS.YOU DONT WANT THAT.TOO MUCH VOLTS.

Posted on Apr 24, 2010

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